Drier



Feb.- 28, 192s. 1,660,801

W. L. MARTIN v DRIER Filed Nov. 18, 1924 Patented Feb. 28, 1928.

UNITED STATES WENDELL L. MARTIN,

OF CLEVELAND, OHIO.

D11-IER.

Application led November 18, 1924. Serial No. 750,584. R E I E D Myinvention relates to driers and the principal object of my invention isto provide a new and improved device of this type. In the drawingsaccompanying this Speciiication and forming a part thereof I have shown,for purposes of illustration, certain forms which my invention mayassume. In.

these drawings:

Figure 1 is a general view of this illustrative embodiment of myinvention.

Figure 2 is a section through the operating parts of the device taken ona plane parallel to Figure 1,

Figure 3 is a diagrammatic representation of the electrical system,while Figure 4 is a fragmentary view illustrating a modified form ofheating unit.

The device shown in Figures 1 through 3 comprises a fan 11 secured b vmeans of al set screw 12 to one end of a shaft 13 forming the armatureshaft of a motor 14 and supported in bearings 15 and 16 carriedrespectively by two shell sections 17 and 18 which together form a shellcompletely enclosing the motor 14. In addition. the shell section 17also carries on its forward end a heating unit 19 comprising a pluralityof converging bars 2O having their converging ends 21 secured togetherin any suitable manner as by bolting and having their diverging ends 22connected by means of struts 23 to fins 24 integral with and extendingfrom the forward end of the shell section 17.

This entire unit is secured to a supportingI ring 30 by means ofradially extending ribs 29 integral with both the shell section 17 andthe ring 30 while the entire unit is enclosed by a pair of casingsections 31 and 32 overlying respectively the rear and forward sides ofthe ring 30, embracing reduced Shoulders 33 and 34 upon the ring 30, andsecured to the ring 30 in any suitable manner, as by set screws 35extending through the casing sections 31 and 32 into the reducedportions 33 and 34 respectively. The rear casing section 31 is providedat its central portion with an aperture 36 arranged to permit theentrance of air into the casing and provided with a suitable screen 37to prevent the entrance of dirt or other foreign matter, while theforward casing section 32 is provided at its central part with anextension 38 embraced by and supporting a tube 39 provided at its freeend with a swiveled nozzle 40 arranged to direct the air in any desireddirection.

The ring 30, and the entire unit carried thereby,l are supported bymeans of a bracket integral with the ring 30 and itself provided with acircular projection 51 adapted to be held by means of a bolt 52 incooperating pivotal relation with a similar circular projection 53carried by a stud 54 provided also with a pin 55 arranged to berotatably received by any suitable socket such as the recess 56extending downwardly into the plug portion 57 of a cap 58 forming partof a stand 60 which also comprises a basev61 provided with an upwardlyextending lug 62 surrounded by a shell 63 extending rom the. base 61 tothe cap 58 and surrounding at its otherend the plug 57 of the cap 58.The cap 58` shell 63, and base 61 are held in assembled relation bymeans of a rod 64 screw-threadedly engaging the plug 57, ex-

tending from the cap 58 through the shell.

60 and an aperture 65 in the base 61, and engaged below the base 61 by anut 66.

The motor 14 is preferably of the series alternating current type andhas its armature 71 and tield 72 connected in series across the linethrough a control switch 73 carried by the bracket 50, through a speedcontrolling rheostat 74 carried by the ring 30 and provided with a shaft75 extending through the ring 30 and surmounted by an accessibleoperating handle (not shown), and through a compensating resistance 76formed about a bar 68 carried by the rheostat 74 and used, when themotor is operating on direct cur rent, to compensate for the decrease inimpedance. The heating element 77 is connected directly across the linethrough the motor control switch 73 and a heater control switch 78 alsocarried by the bracket 50.

The alternative heating unit disclosed in Figure 4 comprises a heatinunit frame 41 in the form of an elongate cross provided with four arms42 meeting at a common junction line and arranged to support the heatingcoil 43 with the ends 44 and 45 thereof connected under nuts 46 carriedby a. pair of bolts 47 which are in turn provided with heads 48overlying and clamping the ends of the circuit wires 70 and are alsoeffective to secure the frame 41 in position on the motor shell section17 by bolting the projecting ends 49 of two opposite arms 42 of theframe 41 to a plate 67 secured to the lu s 24 by means of suitable bolts69.

t will be obvious from the above description that the entire unit hereinshown may be readily removed from the supporting stand without in anyway disassembling the stand and may thereafter be supported from anyother suitable stand or bracket, that by means of the pivotal connectionof the stud 54 to the cap 5S and the pivotal connection between thebracket 50 and the stud 54 the unit may be swung into any desiredposition, that the construction herein shown makes an extremely lightcasing while still adording ample support to the operating and heatingmechanism within the casing, that the motor shell formation herein shownprevents the air current traversing the interior of the motor andtherefore minimizes the likelihood of the air current picking up oil lorodensive odors occurring in the motor lwhile at the same time permittingthe air current to pass over and cool the motor, that each formation ofheater, frame herein shown provides a thoroughly rigid yet economicalsupport for the heating element and at the same time serves to preventand destroy circulatory eddies in the air current, that the rheostatcontrol o f the motor permits full control of the volume of air beingdelivered, either with the heating elementon or without the heatingelement, to thus fully control the volume of the air currentunder allconditions and also control the temperature of the air when the heateris in operation, and that the constructionl shown in Figure t provides areadily removable heating unit. rllhose skilled in the art will findadditional advantages in the particular embodiments of my inventionherein disclosed and will also readily realize that these particularembodiments may be variously changed and modified without departing fromthe spirit of my invention or sacriicing the advantages thereof. litwill thereaeeaeoi fore be understood that this disclosure isillustrative only and that my invention is not limited thereto.

I claimzh 1. lfn combination, a support, a relatively heavy supportingring carried by said support, a blower carried by said ring internallythereof, a heating unit carried by said blower., a relatively light irstcasing member supported by said ring and enclosing said blower andheating unit on one side of said ring, and a relatively light secondcasing member also supported by said ring and enclosing said blower andheating unit on the other side of said ring.

2. ln combination, a support, a relatively heavy supporting ring carriedby said support, a blower and a heating unit supported by said ringinternally thereof. a relatively light irst casing member supported bysaid ring and enclosing said blower and heating unit on one side of saidring, and a relatively light casing member also supported by said ringand enclosing said blower and heating unit on the other side of saidring.

3. ln combination, a support, a relatively heavy supporting ring carriedby said support, a. blower carried by said ring internally thereof, arelatively light first casing member supported by said ring andenclosing said blower on one side of said ring, and a relatively lightsecond casing member also supported by said ring and enclosing saidblower on the other side of said ring.

4. A drier comprising a motor, a fan operated thereby, a heating unit inthe path of the air current set up by said fan and effective to warm theair in said current, and a resistance arranged in the circuit of saidmotor and also positioned in the path of said current but ahead of saidheating unit.

ltn testimony whereof, hereunto aflix my signature.

WENDELL lL. MRTlN.

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